In the rich text editor:
@Orange_Parade
In a comment:
[Orange_Parade](https://chowlings.com/user/Orange_Parade)
For Names and Avatars:
In the rich text editor:
%Orange_Parade
In a comment:
[](https://chowlings.com/user/Orange_Parade) [Orange_Parade](https://chowlings.com/user/Orange_Parade)